US 12,255,405 B2 · Multipath robust antenna design for phase-based distance measurement

Abstract

A system and method reconfiguring an antenna for reducing and/or eliminating the effects of multipath on a phase-based measurement system. The method includes steering an antenna unit into a first direction to cause the antenna unit to generate a first constant tone (CT) signal based on a plurality of multipath signals. The method includes performing a phase measurement on the first CT signal to generate a first phase measurement value. The method includes steering the antenna unit into a second direction to cause the antenna unit to generate a second CT signal based on the plurality of multipath signals. The method includes performing a phase measurement on the second CT signal to generate a second phase measurement value. The method includes determining a change in multipath interference at the antenna unit among the plurality of multipath signals. The method includes re-steering the antenna unit into the first direction.

Claims20

Dependent claims

An antenna unit disposed on a substrate, the antenna unit comprising:

a plurality of channels;
a first switching element and a second switching element;
an antenna feed coupled to a first channel of the plurality of channels;
a first parasitic element coupled to a first terminal of the first switching element, a second terminal of the first switching element coupled to a ground plane of the substrate, and a control terminal of the first switching element coupled to a second channel of the plurality of channels;
and
a second parasitic element coupled to a first terminal of the second switching element, a second terminal of the second switching element coupled to the ground plane of the substrate, and a control terminal of the second switching element coupled to a third channel of the plurality of channels,
wherein each control terminal of the first switching element and the second switching element is configured to toggle to cause the respective first terminal to couple to the respective second terminal, or the respective first terminal to decouple from the respective second terminal.

4 more elements

A system, comprising:

an antenna unit disposed on a substrate, the antenna unit comprising:
a plurality of channels,
a first switching element and a second switching element,
an antenna feed coupled to a first channel of the plurality of channels,
a first parasitic element coupled to a first terminal of the first switching element, a second terminal of the first switching element coupled to a ground plane of the substrate, and a control terminal of the first switching element coupled to a second channel of the plurality of channels, and
a second parasitic element coupled to a first terminal of the second switching element, a second terminal of the second switching element coupled to the ground plane of the substrate, and a control terminal of the second switching element coupled to a third channel of the plurality of channels, wherein each control terminal of the first switching element and the second switching element is configured to toggle to cause the respective first terminal to couple to the respective second terminal, or the respective first terminal to decouple from the respective second terminal;
and
a communication device comprising a radio frequency (RF) port coupled to the antenna feed via the first channel and a communication bus coupled to the control terminal of the first switching element via the second channel and the control terminal of the second switching element via the third channel, wherein the communication device is configured to toggle the first and second switching elements.

5 more elements

A method, comprising:

coupling a first terminal of a first switching element to a second terminal of the first switching element and a first terminal of a second switching element to a second terminal of the second switching element to configure an antenna unit to exhibit a first radiation pattern, wherein the antenna unit is disposed on a substrate, the first terminal of the first switching element is coupled to a first parasitic element and the second terminal of the first switching element is coupled to a ground plane of the substrate, the first terminal of the second switching element is coupled to a second parasitic element and the second terminal of the second switching element is coupled to the ground plane of the substrate;
and
decoupling the first terminal of the first switching element from the second terminal of the first switching element to configure to the antenna unit to exhibit a second radiation pattern different than the first radiation pattern.

Dependencies are inferred from the claim text.

Multipath robust antenna design for phase-based distance measurement

Life of this patent

Multipath robust antenna design for phase-based distance measurement

Life of this patent

Abstract

Claims20